Parts for your 2015 Subaru Outback-Map sensor

2015 Subaru Outback MAP sensor — what it does and how to look after it

Based on technical sources, the 2015 Subaru Outback (BS series, 2.5i FB25 and 3.6R EZ36) is fitted with a Manifold Absolute Pressure (MAP) sensor. The Subaru Service Manual (Engine Diagnostics, EC section for MY2015 Outback/Legacy BS/BN) details a MAP sensor in the intake system and lists corresponding OBD-II trouble codes P0106, P0107 and P0108 for MAP circuit performance, low and high inputs. Subaru’s technical wiring diagrams (STIS) and parts catalogues for the same model year also identify an intake manifold pressure sensor. So, yes — this model uses a MAP sensor.

On a 2015 Outback, the MAP sensor measures the absolute pressure inside the intake manifold. The engine control unit combines that reading with intake air temperature and engine speed to calculate air density, so it can meter fuel accurately and manage ignition timing. It also helps with EGR and load calculations, even though the car also uses a MAF sensor. When the MAP reading is off, drivers may notice a check engine light, doughy throttle response, rough idle, poor fuel economy, or the vehicle dropping into limp mode.

Servicing advice is straightforward. Keep the intake tract sealed and tidy — loose clamps, split hoses or vacuum leaks can throw MAP readings out. If contamination is suspected, the sensor tip can be carefully cleaned with an electronics-safe sensor cleaner, avoid touching the sensing element and don’t blast it. Over‑oiled aftermarket filters can mist oil into the intake and foul sensors, so go easy on the oil or stick with quality filters.

Replacement is typically simple under the bonnet: the MAP sensor is mounted on the intake manifold (near the throttle body on FB25 cars) with a small fastener and an O‑ring. With the ignition off, unplug the connector, remove the fastener, lift the sensor, and inspect/replace the O‑ring. Refit the new unit, tighten to the manufacturer’s spec (do not overtighten the plastic manifold), reconnect the plug, then clear any stored codes with a scan tool. An idle relearn may occur over a short drive as trims settle. Use a genuine or high‑quality aftermarket sensor that matches the OE spec, and if the MIL returns with P0106–P0108 after replacement, check for vacuum leaks, wiring damage, or connector corrosion before throwing more parts at it.

Where is the MAP sensor on a 2015 Subaru Outback?

On the 2.5i FB25, it’s mounted on the top/front of the plastic intake manifold, close to the throttle body, secured by a small bolt and sealed with an O‑ring. On the 3.6R EZ36, it’s also on the intake manifold, positioned for a clear read of manifold pressure. Access is under the bonnet with basic hand tools.

What are common symptoms of a failing MAP sensor on this model?

Expect a check engine light and codes like P0106, P0107 or P0108, rough or hunting idle, flat spots on acceleration, higher fuel use, and sometimes stalling or limp mode. Because vacuum leaks and wiring faults can mimic sensor failure, it’s wise to smoke‑test the intake and inspect the connector before replacing the sensor.

Does the 2015 Outback use both MAF and MAP sensors?

Yes. The 2015 Outback uses a MAF for primary airflow measurement and a MAP for manifold pressure/load data. The ECU blends both signals for precise fuelling and timing, and the MAP often acts as a plausibility check and backup strategy if the MAF signal goes astray.